Combined pipe die and reamer.



No. 746,136; PATENTED DEG. 8,1903.

' A. O'BRIEN. COMBINED PIPE DIE'AND REAMER.

APPLICATION FILED MAY 19, 1902. -1I0 101mg.

. v i w I? k 1. 4 Y a v j c J wMmWZ W /C kNN/l W x h S p a S W W 4 UNITED STATES Patented December 8, 1903.

PATENT OFFICE.

ARTHUR OBRIEN, OF CHICAGO, ILLINOIS, ASSIGNOR TO ARTHUR II. RUGGV l AND THOMAS c. MCOULLOH, OF CHICAGO, ILLINOIS.

COMBINED PIPE DIE-AND REAMER.

SPECIFIGATION forming part of Letters Patent No. 746,136, dated December 8, 1903.

7 Application filed May 19, 1902.

Serial No. 107,970. (No model.)

To all. whom it may concern: I v

Be it known that I, ARTHUR OBRIEN, a citizen of the United States, and a resident Of the city of Chicago, in the county of Oook'and 5 State of Illinois, have invented'c'ertai-n new and useful Improvements in a Com bined Pipe Die and Reamer; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to improvements in reamers, and more particularly to a reamer adapted for use in reaming-the ends of pipes or tubes during the operation of threading the same. I The invention is an improvementover my prior application for reamers, filed March 24, 1902, Serial No. 99,564.

The object of the invention is to provide a construction at once cheap, simple, and durable and one which admits of providing a' relatively long thread on the pipe ends without the removal of the reamer, but which, however, is adapted to permit the reamer to be removed from the die-plate during the threading operation, thereby permitting any desired length of thread to be made upon the pipe.

The invention consists in the matters here inafter described and more fully pointed out and defined in the appended claims.

In the drawings, Figure 1 is a central vertical section of a device embodying myinvention. Fig. 2 is a top plan view of the same; Fig.3 is a perspective view of the reamerblade.

A indicates the die-stock, provided with handles a.

B indicates the die, seated in thes'tock in the usual or any desired manner and held in place by a die-plate C, which, as shown, engages on the top of the die-stock covering the die and provided with a central aperture, through which the pipe end may protrude. Set-screws c c engage the plate to the stock and, if preferred, extend through the ends of the handles a and aiford means for attaching the same in the stock. The die-plate, as clearly shown in Figs. 1 and 2, is provided on diametrically Opposite sides of the central apertu re with the shoulders O, which are provided with grooves orrecessesin the adjacent faces to receive the reamer D. Said reamer,

. as shown, is a fiat blade of steel or other suitable material provided with four-sharp cutting edges and having awidth approximately equal to the desired diameter of the pipe.

'Said blade tapers toward a point at its inner "arms 01 ofthe reamer, as shown in Fig. 1, and 7e serve to rigidly bind the reamer in position. The pipe is indicated by X.

The operation is as followsz-The reamer. when adjusted in position in the die-plate, as shown in Figs. 1 and 2, is of suflicient length for the tapered point thereof .to extend into the end of the pipe when the die is in position for threading the same. The tapering of said reamer-blade is such that cutting operation does not commence until the die is well seated upon the pipe or until the first three threads have been formed. As the die passes downwardly over the pipe the blade of the reamer gradually engages the, inwardlyturned flange or lip of metal formed when -the-pipe was cut, and the reaming operation begins and continues until the said lip or flange is entirely cut away and the warmer assumes the positionindicated in Fig. 1, with the parallel sides of the reamer engaged within the pipe. Should it be desired to produce a long thread upon the pipe, the threading operation may continue until the end of the pipe engages against the top of the reamer. Should it'be desired to produce an extra long thread upon the pipe, the reamer blade may readily be removed by releasing. the setscrews 0' and withdrawing the blade from the plate, after which any length of thread'may be produced. blade is approximately equal to the'norrnal bore of the pipe, it is obvious that the reaming Inasmuch as the width of the Ice operation will cease when the inturned lip has been removed.

Obviously other means may be used to secure the reamer in position and to permit the removal of the same without removing or loosening the die-plate, and many details of construction may be varied without departing from the principles of this invention.

I claim as my invention- 1. The combination with a die-stock, its die and die-plate, of upwardly-extending shoulders on said plate, grooves therein, a reamer slidably secured in said grooves and comprising a flat blade having a tapered point and a plurality of cutting edges.

2. The combination with a die-plate having upwardly-directed shoulders on each side of the central aperture, of parallel grooves in the adjacent faces of said shoulders on opposite sides of the aperture and a reamer provided on each side with parallel arms adapted to engage in said grooves and means for securing said reamer in operative position.

3. The combination with a pipe-die stock, its die and die-plate, of integral upwardlyextending shoulders on the die-plate on opposite sides of the pipe aperture, guidegrooves in the adjacent faces of said shoulders and a reamer adapted to be supported partly on the die and rigidly engaged in said shoulders, the point thereof being tapered and extending below the center of the die.

4:. As an article of manufacture, a reamer for the purpose specified comprising a plate of metal having parallel sides and sharp angles forming cutting edges and tapering toward a point, and having laterally and downwardly directed arms of equal length on each side of said plate forming a recess between said arms and plate.

5. The combination with a pipe-die stock, the die and a die-plate having a pipe-aperture therein, of oppositely-disposed grooved shoulders on said plate, a reamer carried in said grooves, and extending downwardly into the die, and adapted to be inserted or removed from the plate without releasing the plate from the stock.

In witness whereof I have hereunto subscribed my name in the presence of two subscribing witnesses.

ARTHUR OBRIEN.

Witnesses C. W. HILLS, A. C. ODELL. 

